Viability of green roofs as a flood mitigation element in the central region of Chile
Viability of green roofs as a flood mitigation element in the central region of Chile
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DOI：
10.3390/su10041130
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发表时间：
2018-04
期刊：
影响因子：
3.9
通讯作者：
D. Mora-Meliá;Carlos S. López-Aburto;P. Ballesteros-Pérez;Pedro Munoz-Velasco
中科院分区：
文献类型：
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作者：
D. Mora-Meliá;Carlos S. López-Aburto;P. Ballesteros-Pérez;Pedro Munoz-Velasco
智利过去20年的人口增长和城市发展已经超过了大多数雨水排水和疏散系统。许多位于中部地区的城市在冬季降雨期间，其某些部门经常遭受洪水。此外，这些城市缺乏绿色空间，导致生物多样性丧失、温度升高、能源需求增加等。绿色屋顶提供了一种解决方案，可以通过减少城市中大面积、高度不透水区域的径流来缓解气候变化。这项工作分析了安装绿色屋顶作为一个潜在的解决方案，在智利中部的许多城市遭受的部门洪水。该方法包括确定库里科市的冲突部门，使用雨水管理模型（SWMM）软件进行水文建模，考虑不同的分布和类型的绿色屋顶表面，并进行计算机模拟，以确定绿色屋顶防洪的可行性。结果表明，对于中等降雨事件，所有研究部门可以避免洪水，如果至少50%的周围地区有绿色屋顶（无论类型的绿色屋顶）。相比之下，在强降雨事件的存在下，只有一些半广泛的和广泛的绿色屋顶覆盖60%至95%的周围地区，分别可以防止洪水。
Population increase and urban development over the last 20 years in Chile have outgrown most rainwater drainage and evacuation systems. Many cities located in the central region suffer from frequent floods in some of their sectors during winter rainfall events. In addition, the lack of green spaces in these cities leads to biodiversity loss, increasing temperatures, greater energy demands, etc. Green roofs offer a solution that can mitigate climate change by reducing the runoff in cities with extensive, highly impermeable areas. This work analyses the installation of green roofs as a potential solution to the sectorial floods suffered by many cities in central Chile. The methodology includes the identification of conflictive sectors in the city of Curico, hydrological modelling with the Storm Water Management Model (SWMM) software, the consideration of different distributions and types of green roof surfaces, and computational simulations to determine the feasibility of green roofs for preventing floods. The results show that, for moderate rainfall events, all studied sectors could avoid flooding if at least 50% of the surrounding area had green roofs (irrespective of the type of green roof). In contrast, in the presence of strong rainfall events, only some semi-extensive and extensive green roofs covering 60% to 95% of the surrounding area, respectively, could prevent flooding.